A number line is a visual representation of numbers in order from least to greatest. It is a straight line with numbers placed at equal intervals. The numbers to the right of zero are positive, and the numbers to the left of zero are negative.

On a number line, each point corresponds to a number. For example, if you have the number 5, you would locate the point labeled 5 on the number line. Similarly, if you have the number -3, you would locate the point labeled -3 on the number line.

Number lines are useful for understanding the concept of magnitude, comparing numbers, and performing operations such as addition and subtraction. For example, to add 3 to 5, you would start at 5 on the number line and move 3 units to the right to reach the sum, which is 8.

Overall, the number line is a helpful tool for visualizing and understanding the relationship between numbers and their positions in relation to each other.

Study GuideComparing Fractions Activity LessonFraction Circles Activity LessonParty Plan Worksheet/Answer key

Comparing Fractions Worksheet/Answer key

Comparing Fractions Worksheet/Answer key

Comparing Fractions Worksheet/Answer keyComparing Fractions Worksheet/Answer keyOrdering Fractions Vocabulary/Answer keyComparing Fractions

Number and Operations (NCTM)

Understand numbers, ways of representing numbers, relationships among numbers, and number systems.

Develop understanding of fractions as parts of unit wholes, as parts of a collection, as locations on number lines, and as divisions of whole numbers.

Use models, benchmarks, and equivalent forms to judge the size of fractions.

Algebra (NCTM)

Use mathematical models to represent and understand quantitative relationships.

Model problem situations with objects and use representations such as graphs, tables, and equations to draw conclusions.

Grade 3 Curriculum Focal Points (NCTM)

Number and Operations: Developing an understanding of fractions and fraction equivalence

Students develop an understanding of the meanings and uses of fractions to represent parts of a whole, parts of a set, or points or distances on a number line. They understand that the size of a fractional part is relative to the size of the whole, and they use fractions to represent numbers that are equal to, less than, or greater than 1. They solve problems that involve comparing and ordering fractions by using models, benchmark fractions, or common numerators or denominators. They understand and use models, including the number line, to identify equivalent fractions.